Double-disk furrow-opener.



H.4 D. HUNTE DOUBLB DISK FUBBOW EB.

PPPPPP ATIOI YILBD FEB. 8.1910.

Patented Apr. 25, 191'1.

UNlTED srarnsprnnr OFFICE.

HARRY D. HUNTER, OF MARION, INDIANA, ASSIGNOR TO THE AMERICAN DRILL COM-PANY, OF 'MARION, INDIANA, A CORPORATION OF INDIANA.

DOUBLE-DISK FURROW-OPENER.

Specfication of Letters Patent.

To all whom it may concern:

Be it known. that I, HARRY D. HUNTER, a citizen of the United States,residing at Marion, in the county of Grant and State of Indiana, haveinvented certain new and useful Improvements in Double-DiskFurroW-Openers, of Which the following is a specification.

This invention relates to improvements in grain drills and particularlyto disk furrow openers known as the double disk type which consists inemploying twotwin disks rotating in unison having a conduit for feedingthe grain to a point between the disks.

The object of the invention is to improve the efliciency of the completedevice, and the difliculties tobe'overcome in prior structures lies inthe fact that these double disk devices as well as other forms of furrowopeners must be adapted to Various kinds and conditions of seeding. Forinstance With the double disk type the condition of seeding may be suchthat little or no sticky ground will be encountered and for that reasonit must be adapted to that kind of sowing, while for sticky and wetground conditions Will be entirely different, requiring a differentarrangement of the parts composing the structure.

In the device shown herein the parts are so arranged that they can beused in sticky as well as dry and hard ground.

Referring to the drawings: Figure 1 is a Vertical sectional view of afurrow opener embodying my improvements, the section being taken on theline w-m of Fig. 2. Fig. 2 is a rear view of the same. Fig. 3 is adetail View of the Valve.

Like parts are indicated by similar letters of reference throughout theseveral views.

In the accompanying drawings, b represents the usual support for thefurrow opening disks, having at the forward end thereof a projection blto which the usual dragbar is attached, and also having formedintegrally therein the usual conduit al. The twin disks a are providedin the usual Way with hubs 52 which are journaled on laterally extendingtrunnions projecting from the lower end of the conduit, a bolt ba beingadapted to hold the parts in position.

These twin disks a are journaled in the usual way at an angle to aVertical line with their forward or cutting edges converging.

It has been customary to end the conduit at a point substantially at theaxial center of the'disks, as indicated in Fig. 1, so that` the spring`of the year, it is apparent that a scraper device must be employed forthe disk and it has been quite customary to employ a scraper locatedbetween the twin disks such that it Will scrape the adjacent sides ofthe disk and thereby keep the disks from clogging up, but where suchscraper devices have been employed the danger is th'tlif; the scrapersand rotatng disks Will both' operate to prevent the proper seeding ofthe ground, for the seed falling at a point substantially near thecenter of the disks, will be exposed to the danger that the soil carriedup by the disks and the scrapings deflected downwardly will interferewith the proper sowing of the seed. And while it is highly advantageousin some conditions of the soil to sow the seed at the widest point ofthe furrow and for that reason to locate the end' of the conduitrearwardly from the center of the disk, yet in sticky conditions of thesoil it is desirable to sow the seed at a point near the toe of thetrench or close to the point of convergence of the disks. For thatreason it has been. usual to place the toe of the boot forward of thebearings of the disk. But in the improved construction illustrated andshown herein the end of the conduit is maintained at a point slightly tothe re'ar of the center of the disk and other devices are employed tocoperate therewith so .that the devce can be adjusted to sow the seediata point forward of the bearings of the disk and close to the point ofconvergence of the twin disks. To that end, there is employed a Valve orchute ar,2 so associated with the twin disks and the conduit that it maybe adjusted to deflect the seed at a point forward of the center of thedisk. This Valve or chute az is adjustably secured to the Patented Apr.25, 1911.

lower end of the conduit al; the said Valve being provided With aslotted Opening a5 through which extends a screw a4, screwed into therear of the conduit al, which is faced off to receive the said Valve;the construction being such that the valve or ehute can be adjusted atan angle extending downwardly across the vertieal center of said chute.This Valve or chute az is forined of a wedge shape so as to fit rathersnugly between the respective disks and act more or less as a scraper.VVhen the valve is adjusted to the position shown in the full lines inFig. 1', the seed delivered from the bottom of the conduit will beperinitted to drop straight down into the widest part of the furrow,which is a desirable' manner of sowing in dry ground. vWhen sowin undera wet and sticky condition of the soil the valve or chute may beadjusted downwardly vinto the position shown in dotted lines so as todeflect the seed delivered from the conduit to a point forwardly' inconjunetion With the valve or chute a to scrape off the adherng mud anddirt.

Having thus described my invention, I claim:

1. In a double disk furrow opener, the combination of twin disksconverging at their forward edges, a fixed oonduit, an adjustabledefiector secured near the lower end of the conduit capable of beingprojected to a point below the center of the disk whereby the adjustabledeflector may operate to defleet the seed to a point at or near the toeof the trench and below the center of the disk, substantially asspecified.

2. In a furrow opener, the combination of double disks meeting at theirforward ends and diverging at the rear edge thereof, a conduit locatedat the rear of the disks and at the axes thereof,4 an adjustable scraperslidingly mounted near the .lower end of the conduit and adapted topartially close the endof the conduit and defiect the seed forwardly andan additional scraper located rearwardly of the first mentioned scraper,substantially as specified.

In testimony whereof, I have hereunto set my hand this 21st day ofJanuary, 1910.

HARRY D. HUNTER.

Titnessesz Jo STUART, I-IARRIET P. HUNTER.

Copies of this patent may be obtained for five cnts each, by addre'ssngthe Gommissioner of Patents,

Washington, I). C."

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